US4092669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring spatial data from recorded images
Assignee: Rolls Royce PLC
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Filing: 1976-05-17
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Granted: 1978-05-30
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Expires: 1996-05-17
Abstract
Abstract Apparatus for taking spatial measurements from recorded radiographic or photographic films includes a co-ordinate measuring framework on which are statically mounted a video camera and light source, and on which can be placed the film. The camera scans a small area of the film which is illuminated by the light source and the film is movable beneath the camera to enable any part thereof to be scanned. The information produced by the camera is passed to a video-microdensitometer which displays on its output screen an image of the area of the film being scanned. Measurement is achieved by lining features on the displayed image against a datum line by movement of the film below the camera in the framework and noting the co-ordinates of the new positions of the film on the frameworks.
Inventors
- 👤 Keith Ashley Brasnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:18
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/002; G01B11/005; G01B11/02; G01B11/022
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
169 words
Apparatus capable of taking spatial measurements of the relative positions of features of a recorded image comprises a co-ordinate measuring framework, a video camera disposed to scan a selectable area of the recorded image, wherein the video camera and recorded image are mounted for relative movement therebetween on the co-ordinate measuring framework, there being provided means for passing output information from the video camera to a video-microdensitometer for displaying an amplified image of the selected area of said recorded image on an output screen of the video microdensitometer together with a plot representative of the optical density variation along a selected line through said amplified image, said video microdensitometer incorporating at least one datum mark against which the amplified image and corresponding portions of the said plot may be aligned by relative movement of the recorded image and video camera within the co-ordinate measuring framework whereby the relative spatial disposition of parts of the recorded image are determinable from said relative movements by means of the co-ordinate measuring framework.
Claim 2
Dependent Claim
169 words
Apparatus capable of taking spatial measurements of the relative positions of features of a recorded image comprises a co-ordinate measuring framework, a video camera disposed to scan a selectable area of the recorded image, wherein the video camera and recorded image are mounted for relative movement therebetween on the co-ordinate measuring framework, there being provided means for passing output information from the video camera to a video-microdensitometer for displaying an amplified image of the selected area of said recorded image on an output screen of the video microdensitometer together with a plot representative of the optical density variation along a selected line through said amplified image, said video microdensitometer incorporating at least one datum mark against which the amplified image and corresponding portions of the said plot may be aligned by relative movement of the recorded image and video camera within the co-ordinate measuring framework whereby the relative spatial disposition of parts of the recorded image are determinable from said relative movements by means of the co-ordinate measuring framework.
Claim 3
Dependent Claim
30 words
Apparatus according to claim 1 and in which a light source for illuminating an area of said recorded image is mounted on the framework in optical alignment with the camera.
Claim 4
Dependent Claim
28 words
Apparatus according to claim 2 and in which the video camera and light source are fixedly mounted on the framework and the recorded image is movable relative thereto.
Claim 5
Dependent Claim
123 words
Apparatus according to claim 1 and in which the co-ordinate measuring framework comprises a pair of co-ordinate axes, means for supporting a recorded image on a first table movable relative to one co-ordinate axis said first table being supported on a second table moveable on a support relative to the other co-ordinate axis and illuminating means are disposed on the support beneath both tables and are capable of producing a uniformly illuminated area on the recorded image and wherein the tables are adapted to allow the transmission of light therethrough and movable so that any desired portion of the recorded image can be illuminated and whereby the extent of said movements may be determined from respective measuring means associated with each co-ordinate axis.
Claim 6
Independent Claim
183 words
A method of taking spatial measurements of the relative positions of features of an image recorded on film comprises the steps of: mounting the recorded image on a co-ordinate measuring framework, mounting a video camera on the framework, viewing a selected area of the recorded image with the video camera to provide an output image which is fed to a video-microdensitometer, displaying said output image on an output screen of the video-microdensitometer together with a plot representative of the optical density variation along a selected line through the output image, said videomicrodensitometer incorporating at least one datum mark against which desired features of the display image and the corresponding portions of said plot may be aligned, causing relative movement between the recorded image and the video camera withhin the co-ordinate measuring framework thereby producing a corresponding movement of the displayed image on said screen to produce said alignment, whereby the relative spatial dispositions of the desired features of the recorded image are determinable from the relative movements of the recorded image and the video camera as shown by co-ordinate readings from the framework.
Claim 7
Independent Claim
183 words
A method of taking spatial measurements of the relative positions of features of an image recorded on film comprises the steps of: mounting the recorded image on a co-ordinate measuring framework, mounting a video camera on the framework, viewing a selected area of the recorded image with the video camera to provide an output image which is fed to a video-microdensitometer, displaying said output image on an output screen of the video-microdensitometer together with a plot representative of the optical density variation along a selected line through the output image, said videomicrodensitometer incorporating at least one datum mark against which desired features of the display image and the corresponding portions of said plot may be aligned, causing relative movement between the recorded image and the video camera withhin the co-ordinate measuring framework thereby producing a corresponding movement of the displayed image on said screen to produce said alignment, whereby the relative spatial dispositions of the desired features of the recorded image are determinable from the relative movements of the recorded image and the video camera as shown by co-ordinate readings from the framework.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |